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#+TITLE: Undo
The ergonomy of Emacs pre-dates what is now accepted as convention for
the usual copy/paste/undo systems, and so some things are very
different. Undo is one of them.
* Undoing
When starting to undo using a keybind like C-/, Emacs will
implicitly initiate an /undo sequence/. You can carry on hitting C-/
to go back in time until you've found what you wanted; any other
keybind will break the /undo sequence/.
The =undo= action itself is registered in Emacs'undo
system. Therefore, after breaking from an /undo sequence/, it's
possible to undo the undo action, which equates to re-doing.
This is a bit odd, but works quite well.
* Useful links
* [[https://www.gnu.org/software/emacs/manual/html_node/emacs/Basic-Undo.html][Emacs manual: Basic Undo]]
* [[https://www.gnu.org/software/emacs/manual/html_node/emacs/Undo.html][Emacs manual: Undo]]
* [[https://www.emacswiki.org/emacs/UndoTree][EmacsWiki: Undo tree (advanced undo)]]
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